Blade structure for ceiling fans

ABSTRACT

A ceiling fan blade includes a top plate having solid patterns defined in a top surface thereof and a plurality of ridges defined in a bottom surface of the top plate, and a bottom plate which is adhered to the bottom surface of the top plate at a periphery of the top plate and the ridges.

FIELD OF THE INVENTION

The present invention relates to blade structure for ceiling fans andthe blade is composed of a top plate and a bottom plate which is adheredto the top plate. The top plate includes solid patterns defined in a topand bottom surfaces thereof.

BACKGROUND OF THE INVENTION

A conventional blade for a ceiling fan is disclosed in FIG. 1 andgenerally composed of a top plate 10 and a bottom plate 11 which isadhered to the top plate 10. The top plate 10 and the bottom plate 11are both flat ply-wood and the blade is formed to have a flat topsurface and a flat bottom surface. FIG. 2 shows the conventional bladeis composed of a top plate 20 and a bottom plate 21 which is adhered tothe top plate 20. The top plate 20 and the bottom plate 21 are both flatplastic boards. These conventional blades lack aesthetic features andhas less structural strength. The production of the plastic boardsrequire expensive mold sets.

The present invention intends to provide a ceiling fan blade thatincludes a top plate with solid patterns defined in a top surface and abottom surface thereof, and a bottom plate which is adhered to thebottom surface.

SUMMARY OF THE INVENTION

In accordance with one aspect of the present invention, there isprovided a ceiling fan blade which comprises a top plate having solidpatterns defined in a top surface thereof and a plurality of ridges aredefined in a bottom surface of the top plate. A bottom plate is adheredto the bottom surface of the top plate at a periphery of the top plateand the ridges.

The present invention will become more obvious from the followingdescription when taken in connection with the accompanying drawingswhich show, for purposes of illustration only, a preferred embodiment inaccordance with the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 shows a first type of conventional ceiling fan blade;

FIG. 2 shows a second type of conventional ceiling fan blade;

FIG. 3 is a perspective view to show the ceiling fan blade of thepresent invention;

FIG. 4 is an exploded view to show the ceiling fan blade of the presentinvention;

FIG. 5 shows the connection of the top plate and the bottom plate of theceiling fan blade of the present invention;

FIG. 6 shows the connection of the top plate and the bottom plate ofanother embodiment of the ceiling fan blade of the present invention,and

FIG. 7 shows the blades of the present invention connected to a ceilingfan and light assembly.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT

Referring to FIGS. 3 to 5, the ceiling fan blade 30 of the presentinvention comprises a top plate 31 having solid patterns 311 defined ina top surface thereof and a plurality of ridges 312 defined in a bottomsurface of the top plate 31. The ridges 312 can be the bottoms of theconcave portions of the solid patterns 311. A bottom plate 32 has a topsurface 321 which is adhered to the bottom surface of the top plate 31at a periphery of the top plate 31 and the ridges 321. A plurality ofspaces 313 are defined between the bottom surface of the top plate 31and the bottom plate 32 because of the solid patterns 311. The existenceof the spaces 313 makes the blade 30 to be light in weight. Areinforcement ridge 313 protrudes from a central axis of the top surfaceof the top plate 31 so as to reinforce the anti-bend feature of theblade 30.

The top plate 31 or the bottom plate 32 can be made of ply-wood plate orplastic board. The ridges 312 perform as support posts between the topplate 31 and the bottom plate 2 such that the blade 30 will not betwisted. Known surface treatments can be applied to the top surface ofthe top plate 31.

Referring to FIGS. 6 and 7, the solid patterns 311 can be made asdesired so as to match with the style of the interior design.

While we have shown and described the embodiment in accordance with thepresent invention, it should be clear to those skilled in the art thatfurther embodiments may be made without departing from the scope of thepresent invention.

1. A ceiling fan blade comprising: a top plate having solid patternsdefined in a top surface thereof and a plurality of ridges defined in abottom surface of the top plate, and a bottom plate having a top surfacewhich is adhered to the bottom surface of the top plate at a peripheryof the top plate and the ridges.
 2. The ceiling fan blade as claimed inclaim 1, wherein a plurality of spaces are defined between the bottomsurface of the top plate and the bottom plate.
 3. The ceiling fan bladeas claimed in claim 1, wherein a reinforcement ridge protrudes from acentral axis of the top surface of the top plate.